The Mailgun SMTP, IMAP and POP3 settings you need — server smtp.mailgun.org, port 587 (STARTTLS) or 465 (SSL/TLS). Copy each field with one click. Free, with no signup.
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Mailgun mail settings
Outgoing mail (SMTP)
SMTP server
smtp.mailgun.org
Port — STARTTLS
587
Port — SSL/TLS
465
Security
STARTTLS on 587/2525/25 or SSL/TLS on 465.
Incoming mail (IMAP)
IMAP
Not supported — this is a send-only service.
Incoming mail (POP3)
POP3
Not supported by this provider.
Sending limits & login
Daily send limit
Set by your Mailgun plan.
Authentication
Authenticate with the SMTP username (postmaster@your-domain) and the SMTP password from your domain's settings.
App password
Find or reset the SMTP password under Sending > Domain settings > SMTP credentials.
Mailgun is a send-only relay — there is no IMAP or POP inbox. EU-region domains use smtp.eu.mailgun.org.
Sending cold email? EmailChaser manages inboxes, warmup and deliverability for you.
Try EmailChaser freeFind the SMTP, IMAP and POP3 server settings for any email provider. Free, with no signup — every field copies with one click.
To send email through Mailgun, set your outgoing (SMTP) server to smtp.mailgun.org and use port 587 (STARTTLS) or 465 (SSL/TLS). STARTTLS on 587/2525/25 or SSL/TLS on 465.
Mailgun is a send-only relay, so there's no IMAP or POP3 inbox — you only configure the SMTP server above. Use the tool to copy each value into your app or script.
Set by your Mailgun plan. Authenticate with the SMTP username (postmaster@your-domain) and the SMTP password from your domain's settings. Find or reset the SMTP password under Sending > Domain settings > SMTP credentials.
Those caps make single-mailbox sending fine for personal mail but a poor fit for cold outreach at volume. Emailchaser spreads sending across warmed inboxes and manages deliverability, so you can scale without burning Mailgun accounts.
What are Mailgun's SMTP settings?
Mailgun's outgoing (SMTP) server is smtp.mailgun.org. Use port 587 (STARTTLS) or 465 (SSL/TLS). STARTTLS on 587/2525/25 or SSL/TLS on 465. Sign in with your full email address and password (or app password).
What is Mailgun's IMAP or POP3 server?
Mailgun is a send-only service, so it has no IMAP or POP3 inbox — you configure it as an outgoing SMTP server only.
Which port should I use for Mailgun?
Use port 587 with STARTTLS wherever it's offered — it's the modern standard for authenticated sending. Port 465 with SSL/TLS is a solid alternative. Avoid port 25, which most networks block for client sending. Mailgun's recommended value is above.
Why won't my Mailgun SMTP connection work?
Check authentication first: Authenticate with the SMTP username (postmaster@your-domain) and the SMTP password from your domain's settings. Find or reset the SMTP password under Sending > Domain settings > SMTP credentials. Then confirm the host, port and security method match exactly — a 587/SSL or 465/STARTTLS mismatch will fail to connect.
Can I send bulk or cold email through Mailgun?
Not at scale. Set by your Mailgun plan. Providers throttle bursts to fight spam, so pushing cold email through one mailbox hits limits and wrecks deliverability. High-volume outreach belongs on dedicated infrastructure that spreads sending across warmed inboxes — which is what Emailchaser does.
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